The MYRIADE control ground segment is unique and shared with all scientific microsatellite from the MYRIADE series developed by CNES. It has a capacity to operate up to 7 satellites implementing five different scientific missions. Some elements are shared with the ground segment of PROTEUS. This control ground segment is named MIGS (MIcrosatellite Ground Segment). It is operational since DEMETER.

The MIGS reference architecture includes the following elements:

The two S band "Icones" stations multiseries (TTCET) network developed by ELTA company and compatible with the two PROTEUS and MYRIADE series. One station is located in Aussaguel (near Toulouse) and is CNES property. The second station is located in Kiruna. It belongs to SSC (Swedish Space Corporation). These stations are linked to CNES via a satellite link with a 256 kb/s rate (and a back-up RNIS link). The stations provide the command and control link (TM/TC) as well as the reception of the science telemetry. Since mid-2006 this "Icones" network was integrated to CNES 2GHz stations network. As from the operation of PICARD future mission, all 2 GHz stations of the network (including TTCET) will be able to upload TM/TC for satellites of the MYRIADE and PROTEUS series.
The MYRIADE Command Control Center (CCC) is based on a common platform for the PROTEUS and MYRIADE series. It includes:

A multi-mission Nominal Control Center from which the operations (at first DEMETER, presently PARASOL and potentially TARANIS and MICROSCOPE) are achieved.
A MIP Control Center to develop and test the operational procedure, train the operational teams and perform the operations rehearsal of the new satellites in preparation for launch. The switch to the nominal CCC has then been realised to make room for the new missions.
A Test Control Center from which command/control tests are realised for in orbit satellites as well as ground softwares commissioning and no regression tests.
The MYRIADE and PROTEUS CCC common means (back-up, time, centralised booking of TTCET passes and designation of TTCET stations).

The X band Telemetry Earth Terminal (TETX) designed to receive the high rate telemetry. This station was shared between DEMETER and PARASOL and will potentially be used by TARANIS and is dedicated to MYRIADE. This station was developed by SMP. It is located in CNES Toulouse Space Center. It was developed based on a low cost SPOT Light Station (SLS).

The MIGS provides interfaces with the elements specific to each mission; those elements are the following:

A technological mission center where are centralised the technological operations for DEMETER (COA, TMHD,...). It is also located at CNES Toulouse.
The scientific mission centers. For DEMETER, the scientific mission center is located in the LPCE (scientific laboratory responsible of the scientific mission) in Orléans. For PARASOL it is composed of the CMS colocated at CCC and which provides the level 0B processing and the CPP3 which realises the upper levels processings. The CCC interfaces with the mission centers via a specific software component for each mission: G4 (developed by CS SI). For each new scientific mission, a new scientific mission center is added.
The mission centers external to CNES exchange data with the MIGS (mission telemetry, TC plans, auxillary data) by FTP via the SEF (Serveur d'Echange de Données). This server is located at CNES and was developed by CNES.
The CCC interfaces also with CNES multi-mission means (Operational Orbitography Center (COO : Centre d'Orbitographie Opérationnelle) /2 GHz network), particularly for the first acquisition phases during the launch.

The CCC was developed by CNES. The software groups were developed by:

T3S: G1 (TM/TC interfaces, real time RM/RC, IP contacts with the TTCET and TETX).
CS SI: G3 (archiving, prerecorded time survey, FTP contacts with the S band and X band stations), SWWW (data server), G4 (interfaces with the mission centers - specific for each mission), DRPPC (quicklook visualisation), Agenda (operation automation), CCC and MIGS integration help.
Thales IS: G2 (space mechanics, specific for each mission).

The MIGS and CCC internal and external interfaces format is normalised in a Myriade/Proteus generic document (particularly the interfaces between the MIGS and the mission centers). The exchange concepts are thus always the same, which allows to keep a maximum common functionality among the missions.